Paper-creping apparatus



May 31,- 1927. v l 1,630,320

Y K. wANDEl.

PAPER CREPING APPARATUS y -Fiea Haren' 1a.. 1929 a sheets-sheet 1 May 31,1927.

K. WANDEL- PAPER CREPING APPARATUS Filed March 1a; 1920I :s sheets-sheet s Patented May 1927;

j UNITED STATI-:s

, 1,630,320 ATENT. OFFICE,

KURT WANDEL, or N Ew YORK; N. Y., AssIGNoa, BY, minsNE JiSsreNizrruvTs, To ARKELL SAFETY BAG COMPANY, or NEW YORK, N; v ,a CORPORATION or Nnwyonx.

'Parra-carisma APPARATUS.

Application tiled. March 18, 1920. Serial No. 3 6,82i3.b

This invention relates .to the crepingA or crinkling of paperto render the same stretchable and for other purposes and more particularly to apparatus for this pur ose wherein the paper web is caused to ad ere to the crinkling drum byair pressure which permits the paper to be crinkled dry or without preliminary soaking in water as has been necessary methods of crinkling heretofore in common use. One principal Object of the invention is to provide means whereby an air pressure effective ,for caus ing the requisite adherence of the paper to' the roll may be vproduced by an -air suction devicewhich is located at the periphery of the crinkling drum thus dispensing With the need -of any interior suction box or perforations through the drum. Inaccordance with my invention this feature is co-operatively arranged, and carried out in conjunction with an improved construction and type of crinkling drum wherein continuous paper supporting areas are provided circumferentially. of the drum with an elimination of ledges or corners against which the paper'might otherwise lbe caught and pinched by the crinkling doctor which cooperates with the drum. In this improved type of crinkling drum vthe continuous paper supporting areas of the drum alternate throughout the operative length of the drum With suction areas which are obtained by peripheral grooves extending circumfererentiallyI o f thedrum and with which the peripherall suction device of :my invention co-operates. The invention further provides a limited and strictly circumscribed suction area O n the surface of the' drum directly forward of the doctor with'provision for effective packing of this suction area so that there is no loss of or only aiminimum loss of the. suction effect by leakage. The foregoing and other objects and advantages 'of the invention will more fully.

appear ,from the following detailed description, and the distinctive features ofnov'eltyl will be thereafter pointed out in the ap pended claims.

Referring to the drawings: i Fig. 1 is a diagrammatic lengthwise vertical section of an apparatus embodying the invention Fig. 2 1s a partial plan view on an en larged scale showing parts ltheoperative length vthereof with a series the immediate working lsection .v on line. 3T3

a suitably mounted guide roll 11 and thence 1s drawn on to a crinkling drum 12.' This drum has projecting trunnions 12 at its ends mounted forrotation' in a suitable housing support 13 and isV driven in any l,

suitable manner (not shown). This drum4 -is shown as a hollow shell but this formis merely adopted for saving of material vand lightness, since so far as the present invention is concerned ythe vdrum might be asolid cylinder. This drum is formed'throughout of continuous paper supporting areas 13v `which alternate with 'circumferential grooves 14,'the Walls of these grooves being preferably somewhat tapered outwardly as indicated at 14a. 'A doctor blade l15 is stationarily mounted forco-operation with this crinkling drum and Vits operative edge is equipped with aseries of fingers or projections 16 extendinginto the grooves 14 vand shown as beveled so as to f it closely therewith; the ends of said projections ex tending to the bottom of the grooves'so that i this edge of thel doctor makes a close fit throughout .with the surface of the drum.

Thus, the,fingers'themselvesserve to prevent leakage of air Iunderneath the' doctor, although the use of such fingers for' this purpose is not essential .andthe purpose mayl be accomplished by other ,means A packing 'blo'ck 17 4is stationarily mounted 4forward of the doctor and equipped with projections or vfingers 18 extending tangen- "tially of the drum and with their forwardends 'formed to fit closely the grooves 14 10o", whilethe tops 'ofsaid projectionslie flush l with the paper supporting surfaces 13 of the drum. The ends of these projections-18" are spaced a small angular distance .froml the doctor sufficient so that 4'the extent of the grooves 14 from such ends to the' doctor is sufficient to provide suction areas adeuate for lholding the paper' adherent to the.

rum to draw it 4forward and present it to 'the doctor. 19 indicates a pipe leading from a suitable source of air suction such as an ordinary, suction pump (not shown).

From this pipe a series of branches 2() lead through the respective projections 18 to the ends thereof and so as to communicate with the suction areas provided by the grooves.

14 between the ends of the projections and the doctor. These branches may be controlled by a series of individual valves 21 sothat the required air suction effect may be provided and varied selectively as required for best results. vThe paper Web W is caused to adhere strongly and uniformly to the crinkling drum by the suction thus produced in the suction areas of the grooves lelaiid is thus drawn from the supply roll and presented to the doctor from which it'is cleared with a scuiiing or pressing back upon itself which produces; a crinkled web l/V that may`be led on to a take-on roll R or otherwise takencare of. yThe action of the doctor in producing this crinkled effect' is generally similar to that vby ywhich crin-l kled paper has been` heretofore produced, but it is to be noted that by reason ofl the strong adherence of the paper to the drum produced by the suction effect, the paper` quired as is the case in crinkling paper that Y tion.

has been previous] wetted as has been the common practice eretofore. It lis to be particularly noted that since the surface portions 13 lof the crinkling drum present continuous paper supporting areas circumferentially of the drum, and since the fin- 'gers 16 of the doctor i'it into the intermediate grooves between such areas, there'are' 4no projections Orledges on the surface of the crinklinfr drinn that could catch or cause pinching of the paper against the doctor which would tend to tear or produce holes therein. The present means for producing the suction effect is particularly simple and efficient in that it dispenses with the need of any suction box interior of the drum. or of perforating the drum as has hitherto been proposed to obtain the required suc- With the described construction all the working parts are not only of the greatest simplicity but they are located so as to be conveniently accessible for attention and control and the crinkling drum itself is an element inexpensive and easy to produce without requiring any considerable machining other than merely turning the grooves therein as described. I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I. therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing -description tolindi'cate they scope of thev invention.

l Having describedmy invention, what I claim as new and desire to secure by Letters Patent is: l

1. Paper crinkling apparatus, comprising a crinkling drum, a doctor cooperative therewith, and means external of the drum for holding the paper adherent-thereto by air suction in advance of the doctor, said drum presenting a series of continuousl sup-l porting areas circuinferenta'lly of the drum alternating with circumferential grooves con. stituting suction areas,said supporting areas actin to holdl the paper substantially out of said grooves. f

2. Paper crinkling apparatus, comprising a crinkling drum, a 'doctor co-ope-rative therewith, and means external of the drum for holding the paper adherent thereto by air suction in advance of the doctor, said drum presenting a series of continuous supporting areas circumferentially of the drum alternating with circumferential grooves,`

said' supporting areas acting to hold the paper substantially out of said grooves, said doctor having a series of projections entering'said grooves of the drum.

3. Paper crinkling apparatus, comprising a crinkling drum having an operative `surface composed of a series of circumferential paper supportin series of circum erential grooves, a doctor having projections entering such grooves, a packing device comprising a seriesof fingers fitting said grooves a substantial distance forward of lthe doctor, and an air suction conduit having branches extending through said projections 4. Paper crinkling apparatus, comprisinga crinkling. drum presenting a series of circumferential paper supporting areasalternating with a series of circumferential grooves, said rooves havin beveledy Side walls, a doctor aving projections tapered to enter'said grooves,a packing device having 'a series of projections also tapered to lit said grooves, said projections terminating a substantial distance forward of the doctor, and

an air suction conduit having branches extending through said packing projections.

5. Paper crinkling apparatus, comprising a crinkling drum having an operative surface composed of a series of circumferential supporting areas alternating with a series of circumferential grooves, said supporting areas actin to hold the paper substantially out of sai grooves, crinkl'ing means assoareas alternating with vaA ciated with said drum, and -a suction device external of said drum and communicating with said grooves for; holding the paper on-said supporting areas as the paper meets the crinkling means.

6. Paper crinkling apparatus, comprising a c drum having an operative surface composed of a series of circumferential supporting areas alternating with a series of circumferential grooves, said supporting areas acting to hold the paper substantially out of said grooves, crinkling means associ ated with said drum, portions of such grooves in the region of the crinklng vmeans being segregated from the remaining por tions thereof, and a suction device external of the drum communicating with said segregated portions of the grooves.

In testimony whereof, I have signed my name to this specification.

KURT WANDEL.. 

